Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must walnut you must walnut he must walnut we must walnut you must walnut they must walnut
V-ing form
I must be walnuting you must be walnuting he must be walnuting we must be walnuting you must be walnuting they must be walnuting
Perfect
I must have walnuted you must have walnuted he must have walnuted we must have walnuted you must have walnuted they must have walnuted
V-ing perfect
I must have been walnuting you must have been walnuting he must have been walnuting we must have been walnuting you must have been walnuting they must have been walnuting
Negation
Simple form
I must not walnut you must not walnut he must not walnut we must not walnut you must not walnut they must not walnut
V-ing form
I must not be walnuting you must not be walnuting he must not be walnuting we must not be walnuting you must not be walnuting they must not be walnuting
Perfect
I must not have walnuted you must not have walnuted he must not have walnuted we must not have walnuted you must not have walnuted they must not have walnuted
V-ing perfect
I must not have been walnuting you must not have been walnuting he must not have been walnuting we must not have been walnuting you must not have been walnuting they must not have been walnuting
Interrogative form
Simple form
must I walnut? must you walnut? must he walnut? must we walnut? must you walnut? must they walnut?
V-ing form
must I be walnuting? must you be walnuting? must he be walnuting? must we be walnuting? must you be walnuting? must they be walnuting?
Perfect
must I have walnuted? must you have walnuted? must he have walnuted? must we have walnuted? must you have walnuted? must they have walnuted?
V-ing perfect
must I have been walnuting? must you have been walnuting? must he have been walnuting? must we have been walnuting? must you have been walnuting? must they have been walnuting?
Interro-negative form
Simple form
must I not walnut? must you not walnut? must he not walnut? must we not walnut? must you not walnut? must they not walnut?
V-ing form
must I not be walnuting? must you not be walnuting? must he not be walnuting? must we not be walnuting? must you not be walnuting? must they not be walnuting?
Perfect
must I not have walnuted? must you not have walnuted? must he not have walnuted? must we not have walnuted? must you not have walnuted? must they not have walnuted?
V-ing perfect
must I not have been walnuting? must you not have been walnuting? must he not have been walnuting? must we not have been walnuting? must you not have been walnuting? must they not have been walnuting?